Oakland Raiders' Denarius Moore back at practice

FILE - In this Aug. 28, 2011, file photo Oakland Raiders wide receiver Derek Hagan heads to the end zone with a touchdown reception against the New Orleans Saints during the first quarter of a preseason NFL football game in Oakland, Calif. The Raiders announced Thursday, Sept. 6, 2012, that they have brought back Hagan for a second stint with the team. He played six games for Oakland last season before being cut during the season. Hagan spent the rest of 2011 and this year's training camp with Buffalo before being cut last week. (AP Photo/Paul Sakuma, File)

ALAMEDA -- Denarius Moore took the field for the first time since Aug. 4, Derek Hagan suited up as a Raider for the first time since last November, and coach Dennis Allen couldn't say for sure if either one would be a factor when the team opens the season Monday night against the San Diego Chargers.

Moore has been out with a hamstring strain that put him on the sideline during training camp a year after his performance in the preseason launched him into a featured role when healthy.

"He moved around pretty well today," Allen said of the wide receiver. "We're going to keep taking a look at him and keep evaluating him. The good news is we don't have to make any type of decision until game day."

Moore said the length of recovery time was designed to give him full confidence that his hamstring would hold up, but he said he was easing his way back.

"It's huge just to see him out there in shoulder pads, it's been so long," quarterback Carson Palmer said. "It's good to see him getting his legs back underneath him."

One of Palmer's favorite targets last season, Moore must rebuild that trust.

"It's going to be hard," Moore said. "As soon as we get back out there we have to make sure the timing is down and get back to where we were last year."

Wide receiver Jacoby Ford did not practice with a foot injury, and rookie Juron Criner was limited with an ankle injury, making Hagan's signing a necessity.

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Hagan, who made the Raiders with an excellent training camp in 2011, was cut six games into the season in favor of T.J. Houshmandzadeh, who had a history with both Palmer and coach Hue Jackson.

He finished the season with the Buffalo Bills but failed to make the 53-man roster. The Raiders also worked out veterans Jabar Gaffney and Tiquan Underwood before signing Hagan.

"He's got a little familiarity with the people, the system's different," Allen said. "But I thought for the first day out here in a new system I thought he did some good things."

Kicker Sebastian Janikowski returned to practice after missing Tuesday's session following the birth of twin daughters.

Stefen Wisniewski practiced fully with a calf strain but worked with the second-team offense with Alex Parsons at first-team center.

Those who had limited participation in practice were Criner, Moore, defensive tackle Richard Seymour (knee) and guard Cooper Carlisle (back).

Rapper Ice Cube will perform a Raiders anthem recently produced for Pepsi during Monday night's pregame. The national anthem will be sung by Gene Simmons of the rock band KISS.